How many children does uncle tom have?

It seems like you're referencing the character "Uncle Tom" from Harriet Beecher Stowe's novel "Uncle Tom's Cabin."

It's important to remember that Uncle Tom is a fictional character. He does not have real-life children.

In the book, Uncle Tom has a daughter named Eva, but she unfortunately dies in the story.

If you are thinking of a different "Uncle Tom," please provide more information so I can assist you better.